240670405 has 4 divisors (see below), whose sum is σ = 288804492. Its totient is φ = 192536320.

The previous prime is 240670373. The next prime is 240670429. The reversal of 240670405 is 504076042.

240670405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147914244 + 92756161 = 12162^2 + 9631^2 .

It is not a de Polignac number, because 240670405 - 2⁵ = 240670373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24067036 + ... + 24067045.

It is an arithmetic number, because the mean of its divisors is an integer number (72201123).

Almost surely, 2^240670405 is an apocalyptic number.

It is an amenable number.

240670405 is a deficient number, since it is larger than the sum of its proper divisors (48134087).

240670405 is an equidigital number, since it uses as much as digits as its factorization.

240670405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48134086.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 240670405 is about 15513.5555241215. Note that the first 4 decimals coincide. The cubic root of 240670405 is about 622.0246033009.

The spelling of 240670405 in words is "two hundred forty million, six hundred seventy thousand, four hundred five".